noun
or kilo·gramme -ˌgram, -raa(ə)m
Etymology: French kilogramme, from kilo- + gramme gram — more at gram
1. : the basic metric unit of mass and weight equal to the mass of a platinum-iridium cylinder kept at the International Bureau of Weights and Measures near Paris and nearly equal to 1000 cubic centimeters of water at the temperature of its maximum density — see metric system table; abbreviation kg
2. : a unit of force equal to the weight of a kilogram under standard gravity